/*
 * lab10D2.c
 * CSIS 248 Lab #10
 */
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char **argv) {
	int aflag = 0;
	int bflag = 0;
	char *cvalue = NULL;
	int index;
	int c;

	opterr = 0;

	while ((c = getopt(argc, argv, "abc:")) != -1)
		switch (c) {
		case 'a':
			aflag = 1;
			break;
		case 'b':
			bflag = 1;
			break;
		case 'c':
			cvalue = optarg;
			break;
		case '?':
			if (optopt == 'c')
				fprintf(stderr, "Option -%c requires an argument.\n", optopt);
			else if (isprint (optopt))
				fprintf(stderr, "Unknown option '-%c'.\n", optopt);
			else
				fprintf(stderr, "Unknown option character '\\x%x'.\n", optopt);
			return 1;
		default:
			abort();
		}

	printf("aflag = %d, bflag = %d, cvalue = %s\n", aflag, bflag, cvalue);

	for (index = optind; index < argc; index++)
		printf("Non-option argument %s\n", argv[index]);
	return 0;
}
